Cancel scheduled sends

Using the Cancel Scheduled Sends API, you can cancel or pause sending one or more groups of emails. SendGrid defines these multiple scheduled send requests together as batches identified with a batch_id.

With this API, you can perform the following tasks on scheduled emails:

• Define and validate the ID for a batch of messages.
• Retrieve, update, pause, resume, or cancel a scheduled send.

Cancelling or pausing a batch of messages include the following conditions:

• You can't pause or cancel more than 10 different batches at one time.
• You can't pause or cancel a batch later than 10 minutes before the scheduled send_at time.
• When you cancel or pause a batch, all messages associated with that batch stay in your sending queue.
• When a cancelled batch reaches its send_at time, SendGrid discards the messages.
• When a paused batch reaches its send_at time, SendGrid retains the messages. When you resume a paused batch, SendGrid delivers your scheduled send.
• When a paused batch passes 72 hours after its send_at time, SendGrid discards the messages as Expired.

To cancel a scheduled send of a single message, consult Canceling a Scheduled Send.